Nongonococcal urethritis may be caused by the protozoan ________
A) Chlamydia trachomatis
B) Neisseria gonorrhoaea
C) Haemophilus ducreyi
D) Trichomonas vaginalis
Answer: D
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Explain how Mendel’s law of segregation applies to the distribution of alleles in gametes.
What will be an ideal response?
Rabbits introduced to Australia overpopulated because in their new habitat, ____
a. people rarely hunted them b. they had no natural diseases c. they had no natural predators d. their food supply was larger e. there were few herbivorous competitors
The offspring of a monohybrid testcross could have what possible genotype(s)?
A. AA, Aa, and aa B. AA only C. aa only D. Aa and aa E. AA and Aa
Select all of the following that are postzygotic isolating mechanisms.
A. Hybrids develop abnormally. B. Hybrids cannot be formed. C. Hybrids fail to become established in nature. D. Hybrids are sterile.